Portable wireless communication device and methods of configuring same when connected to a vehicle

ABSTRACT

A portable wireless communication device ( 22 ) and method for configuring the same when connected to a hands-free system in a vehicle ( 20 ). In one embodiment, the device ( 22 ) has an interface ( 36 A) and a detector ( 70 A). The interface ( 36 A) is for connecting the wireless communication device ( 22 ) to a hands-free control unit ( 24 ) in the vehicle ( 20 ). The detector ( 70 A) is for determining whether the interface ( 36 A) is connected to the hands-free control unit ( 24 ) in the vehicle ( 20 ). The wireless communication device ( 22 ) may obtain vehicle information from the vehicle ( 20 ) when it is determined that the interface ( 36 A) is connected to the hands-free control unit ( 24 ). The wireless communication device ( 22 ) also configures at least one operation of the wireless communication device ( 22 ) based on the obtained vehicle information. For example, the vehicle information may include data associated with a power loss for communicating through an external antenna ( 40 ) of the vehicle ( 20 ). The operation configured in the wireless communication device ( 22 ) would then be adjusting an output power of the wireless communication device ( 22 ) based on the data in the vehicle information.

The present application is a divisional application of, and claimspriority and full benefit under 35 U.S.C. § 120 of previous U.S. patentapplication Ser. No. 10/262,159, for “Portable Wireless CommunicationDevice and Methods of Configuring Same When Connected to a Vehicle”,filed Aug. 11, 2004, and assigned to Motorola, Inc., and which isincorporated herein by reference in its entirety.

FIELD OF THE INVENTION

This invention in general relates to hands-free cellular communicationsystems for vehicles and, more particularly, to a system and method ofconfiguring a portable wireless communication device when the device isconnected to a vehicle.

BACKGROUND OF THE INVENTION

Today, many people use portable wireless communication devices in theirvehicles. For safety reasons, the industry is focused on providinghands-free features to people who use portable devices in their vehicle.There is a need for better performance and more efficient communicationswhen a portable wireless communication device is connected to ahands-free system of a vehicle.

For instance, a portable wireless communication device may be connectedto an external antenna on the vehicle when using the hands-free system.When using an external antenna, however, there may be unacceptableperformance due to power losses associated with sending transmissionsover vehicle cables that lead to the external antenna. If the power lossfrom the cables is relatively high, the hands-free system may yieldworse performance than if the user simply unplugged the device and heldthe device to their head. To solve this problem, conventional factoryinstalled hands-free systems use a RF compensator that “compensates” forany power loss due to communicating through the cables leading to theexternal antenna. Compensators, however, are expensive and contributesignificantly to the cost of the entire system. A system and method thateliminates the compensator and yet maintains acceptable performancewould provide a significant cost benefit.

Additionally, there is a need for better ways to configure the portablewireless communication device so that it can efficiently communicatewith a variety of hands-free systems. For example, in some hands-freesystems, the device must be manually configured to forward incomingphone calls to an existing in-vehicle Telematics system such as theOnStar system provided by General Motors. The OnStar system provideshands-free personal voice communications through the audio system of thevehicle. A user, however, must manually forward calls from the portablewireless communication device to a special phone number designated by asystem operator. Knowledge of the phone number is necessary. It would bebeneficial to eliminate the manual operation of forwarding calls andmake the system compatible to different vehicles.

It is, therefore, desirable to provide an improved hands-free cellularcommunication system and method for dynamically configuring a portablewireless communication device to overcome or minimize most, if not all,of the preceding problems.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a portable wireless communication deviceand a hands-free control unit in a vehicle according to one embodimentof the present invention;

FIG. 2 is a perspective view of a portable wireless communication deviceand a hands-free control unit in a vehicle according to anotherembodiment of the present invention;

FIG. 3 is a block diagram of a portable wireless communication deviceconnected to a vehicle according to one embodiment of the presentinvention;

FIG. 4 is a block diagram of a portable wireless communication deviceconnected to a vehicle according to another embodiment of the presentinvention;

FIG. 5 is a flow diagram of a method to configure a portable wirelesscommunication device according to one embodiment of the presentinvention;

FIG. 6 is a flow diagram of another embodiment of a method to configurea portable wireless communication device according to the presentinvention; and

FIG. 7 is a flow diagram of a further embodiment of a method toconfigure a portable wireless communication device according to thepresent invention.

While the invention is susceptible to various modifications andalternative forms, specific embodiments have been shown by way ofexample in the drawings and will be described in detail herein. However,it should be understood that the invention is not intended to be limitedto the particular forms disclosed. Rather, the invention is to cover allmodifications, equivalents and alternatives falling within the spiritand scope of the invention as defined by the appended claims.

DETAILED DESCRIPTION

What is described is a system and method of configuring a portablewireless communication device when the device is connected a hands-freecontrol unit in a vehicle. The system and method reduces the cost of thehands-free control unit as well as reduce the complexity of making theportable wireless communication device compatible to different types ofvehicles and hands-free systems.

To this end, in one embodiment there is a portable wirelesscommunication device comprising an interface and a detector. Theinterface is for connecting the wireless communication device to ahands-free control unit in a vehicle. The detector is for determiningwhether the interface is connected to the hands-free control unit in thevehicle. The wireless communication device obtains vehicle informationfrom the vehicle when it is determined that the interface is connectedto the hands-free control unit. The wireless communication device alsoconfigures at least one operation of the wireless communication devicebased on the obtained vehicle information.

For example, the vehicle information may include data associated with apower loss for communicating through an external antenna of the vehicle.The operation configured in the wireless communication device would thenbe adjusting an output power of the wireless communication device basedon the data in the vehicle information.

In another example, the vehicle information may include data associatedwith a separate vehicle transceiver. The operation configured in thewireless communication device would then be forwarding an incoming callto the separate vehicle transceiver based on the data in the vehicleinformation. This could be accomplished by notifying the cellularnetwork to forward an incoming call to the number associated withestablishing a wireless communication link with the vehicle's embeddedcellular transceiver.

In a further example, the vehicle information may include dataassociated with a vehicle's positioning unit. The operation configuredin the wireless communication device would then be adjusting anavigation routine within the wireless communication device to receivepositioning information from the vehicle's positioning unit. This couldtake place if a positioning unit within the wireless communicationdevice has failed.

Another embodiment includes a system for configuring a portable wirelesscommunication device when connected to a vehicle that comprises avehicle interface, a vehicle detector, and a microcomputer. The vehicleinterface is in the portable wireless communication device and is usedfor connecting the wireless communication device to the vehicle. Thevehicle detector is in the portable wireless communication device and isused for determining whether the interface is connected to the vehicle.The microcomputer is also in the portable wireless communication deviceand used for accessing vehicle information from the vehicle when it isdetermined that the vehicle interface is connected to the vehicle. Themicrocomputer is also used for configuring at least one operation of thewireless communication device based on the vehicle information obtainedfrom the vehicle.

A further embodiment includes a portable wireless communication devicethat comprises a first interface, a second interface, and amicrocomputer. The first interface is used for connecting the wirelesscommunication device to a vehicle. The second interface is used forconnecting the wireless communication device to an external antenna. Themicrocomputer has a first and second detector. The first detector isused for determining whether the first interface is connected to thevehicle. The second detector is used for determining whether the secondinterface is connected to the external antenna. The microcomputer mayfurther be programmed to access data associated with a power loss forcommunicating through the external antenna and for adjusting an outputpower of the wireless communication device based on the accessed data.The adjustment occurs when the first detector determines that the firstinterface is connected to the vehicle and the second detector determinesthat the second interface is connected to the external antenna.

There is also a method in a portable wireless communication device thatcomprises the steps of: determining whether the wireless communicationdevice is connected to a vehicle; accessing vehicle information from thevehicle when it is determined that the wireless communication device isconnected to the vehicle; and configuring an operation in the wirelesscommunication device based on the vehicle information accessed from thevehicle.

The vehicle information accessed from the vehicle may include dataassociated with a power loss for communicating through an externalantenna of the vehicle. Here, the operation configured in the wirelesscommunication device would then include adjusting an output power of thewireless communication device based on the data in the vehicleinformation. The vehicle information accessed from the vehicle may alsoinclude data associated with communicating with a separate cellulartransceiver in the vehicle. The operation configured in the device wouldthen include forwarding an incoming call to the separate cellulartransceiver based on the vehicle information. The vehicle informationaccessed from the vehicle may further include data associated with apositioning unit in the vehicle. The operation configured in the devicewould then include adjusting a navigation routine within the device toreceive positioning information based on the data in the vehicleinformation.

In another embodiment, there is a method in a portable wirelesscommunication device that comprises the steps of: determining whetherthe wireless communication device is connected to a vehicle; determiningwhether the wireless communication device is connected to an externalantenna; and if the wireless communication device is connected to thevehicle and the wireless communication device is connected to theexternal antenna, then obtaining data associated with a power loss forcommunicating through the external antenna and adjusting an output powerfor uplink wireless transmissions based on the obtained data. The methodmay further comprise the steps of: determining whether the wirelesscommunication device is in an active call; and if it is determined thatthe wireless communication device is not in an active call, thenchanging a registration of the wireless communication device with anetwork.

In a further embodiment, there is a method in a portable wirelesscommunication device that comprises the steps of: determining whetherthe wireless communication device is connected to a vehicle; obtainingvehicle information from the vehicle; determining whether the vehiclehas a separate cellular transceiver; and if it is determined that thevehicle has a separate cellular transceiver, then forwarding an incomingcall to the separate cellular transceiver in the vehicle based on thevehicle information obtained from the vehicle. The method may furthercomprise the steps of: if it is determined that the vehicle does nothave a separate cellular transceiver, then configuring the portablewireless communication device to transfer audio received in a downlinkwireless transmission to the vehicle.

Now, turning to the drawings, FIGS. 1 and 2 illustrate two embodimentsof the present invention for attaching a portable wireless communicationdevice 22 to a hands-free control unit 24 in a vehicle 20. In theembodiment illustrated in FIG. 1, the portable wireless communicationdevice 22 is attached to the hands-free control unit 24 by at least oneexternal communication cord 26A, 26B and at least one internal cable28A, 28B. In the embodiment illustrated in FIG. 2, the portable wirelesscommunication device 22 is capable of being attached to the hands-freecontrol unit 24 by a receiving cradle 30 in the vehicle 20. Here, theportable wireless communication device 22 is connected directly to theinternal cables 28A, 28B at the receiving cradle 30. In eitherembodiment, the hands-free control unit 24 allows the portable wirelesscommunication device 22 to establish a voice communication through theradio system (including an audio speaker 32 and a microphone 34) in thevehicle 20.

As shown in FIGS. 1 and 2, the portable wireless communication device 22may have a first interface 36A that is electrically connected to atleast a first internal cable 28A. The first internal cable 28A provideconnectivity to the hands-free control unit 24. As will be explainedlater, in some embodiments, the first internal cable 28A may allow theportable wireless communication device 22 to receive vehicle informationfrom the vehicle 20 regarding features of the hands-free system and dataassociated with those features. Depending on the features of thehands-free system, the first internal cable 28A may also provide theportable wireless communication device 22 with the ability to forwardaudio from downlink wireless communications A, through the hands-freecontrol unit 24, to the vehicle audio speakers 32. The first internalcable 28A may further provide the portable wireless communication device22 with the ability to receive audio for uplink wireless communicationsB, through the hands-free control unit 24, from the vehicle microphone34.

In certain embodiments, the portable wireless communication device 22may also have a second interface 36B that is connected to a secondinternal cable 28B. Here, the second internal cable 28B providesconnectivity to an external antenna 40. The external antenna 40 may beattached to the exterior of the vehicle 20 for the purpose of receivingdownlink wireless communications A and transmitting uplink wirelesscommunications B. When using an external antenna 40, however, priorsystems sometimes require the use of a compensator in the vehicle toprovide acceptable wireless communication through the external antenna40. The in-vehicle compensator used in known systems “compensates” forany power losses during the transmission of communications through thesecond internal cable 28B. As mentioned earlier, however, compensatorsare expensive and contribute significantly to the cost of the entiresystem. As will be explained in more detail below, the present inventionprovides a significant cost advantage because it eliminates the need foran in-vehicle compensator through the access of vehicle configurationinformation. The vehicle configuration information may then be used bythe portable wireless communication device 22 during call set-up toconfigure the device.

In one embodiment, the operator of the vehicle 20 may initiate a callset-up by activating a switch 42 on the vehicle when the operatordesires to place an outgoing cellular voice communication or when theoperator desires to accept an incoming cellular voice communication.Alternatively, the operator of the vehicle may initiate a call set-up byactivating a switch on the user interface 44 of the portable wirelesscommunication device 22.

The interaction between the portable wireless communication device 22and the vehicle 20 will now be explained in the context of FIGS. 3 and4. The difference between these two figures is that the hands-freesystem in FIG. 3 relies upon the connection between the portablewireless communication device 22 and the vehicle 40 to transfer audiofor uplink and downlink wireless communications. The hands-free systemin FIG. 4 includes a separate cellular transceiver 50 in the vehicle 40.The vehicle cellular transceiver 50 shown in FIG. 4 is used for uplinkand downlink wireless communications through the radio system.

FIGS. 3 and 4 illustrate a portable wireless communication device 22 inthe form of a cellular phone capable of transmitting and receivingcellular voice communications. In this embodiment, the portable wirelesscommunication device 22 may include microcomputer 52, a memory 54, afirst (or a vehicle) interface 36A, a second (or an external antenna)interface 36B, a cellular transceiver 56, an internal antenna 58, aninternal microphone 60, an internal speaker 62, a user interface 44, anda power supply 64. The wireless communication device 22 may furtherinclude other circuitry such as switches (including an antenna switch66) for interconnecting the components within the wireless communicationdevice 22. The switches may be controlled by the microcomputer 52. Themicrocomputer 52 and memory 54 may also be referred to as a controllerof the device 22 and, preferably, includes a digital microprocessor.

As will be explained in more detail below, prior to or during callset-up, the microcomputer 52 of the portable wireless communicationdevice 22 may include a first vehicle detector 70A to determine whetherthe first interface 36A is connected to the hands-free control unit 24.In one embodiment, the first detector 70A may include a circuit thatmonitors one of the communication lines that may be connected to thefirst interface 36A in the first internal cable 28A. If the monitoredcommunication line is temporarily connected to ground, then the firstdetector 70A determines that the first interface 36A of the portablewireless communication device 22 is connected to the hands-free controlunit 24.

As will also be discussed in more detail below, the portable wirelesscommunication device 22 may further include a second detector 70B todetermine whether the portable wireless communication device 22 isproperly connected to the external antenna 40. In one embodiment, theexternal antenna may contain a resistor in the base of the antenna whip.The second detector 70B may include circuitry that detects the presenceof the resistor in the base of the antenna whip. Alternatively, thesecond detector 70B may include circuitry to monitor a conductor withinthe internal cable 28B to see if it is grounded. The conductor beinggrounded when connected to the external antenna 40. One of ordinaryskill in the art having the benefit of this disclosure will realize thatthere may be many other ways to design a circuit to detect the presenceof the external antenna 40. What is important is that the detector 70Bverifies that an electrical connection exists between the antennainterface 36B of the device 22 and the external antenna 40.

Referring initially to FIG. 3, in response to detecting and receiving anactivation signal or other indicator for a call set-up, the portablewireless communication device 22 may send the audio from downlinkcommunications A to the vehicle audio speakers 32 via the first (or avehicle) interface 36A. In one embodiment, the system includes anexternal communication cord 26A that connects the first (or vehicle)interface 36A in the portable wireless communication device 22 to adevice interface 68 in the vehicle 20. This arrangement is furtherillustrated in FIG. 1. In another embodiment, the system may eliminatethe external communication cord 26A by simply providing a receivingcradle 30 for docking the portable wireless communication device 22 tothe vehicle 20. This embodiment was further illustrated previously inFIG. 2. In either case, what is important is that there is acommunication connection between the portable wireless communicationdevice 22 and the hands-free system in the vehicle 20.

The communication connection between the portable wireless communicationdevice 22 and the vehicle 20 may serve a variety of purposes. First, itmay be important for some operations to determine whether the portablewireless communication device 22 is actually connected to a hands-freecommunication system within the vehicle 20. For example, if the portablewireless communication device 22 is a portable phone, it must bedesigned to comply with relevant national and international standardsand guidelines regarding exposure to radio frequency electromagneticenergy (EME). There are different power classes for wireless devices.Portable phones that operate next to a person's body (handheld portabledevices) are generally limited to certain maximum RF power limitsspecified according to one class or set of power control levels. Othercellular communication devices (such as transportable or vehicularmounted units or devices) are permitted to operate at higher powerlimits specified according to another class or set of power controllevels.

The present invention takes advantage of the differences in classes orsets of power control levels to overcome any power losses that may occurwhen a device 22 operates through an external antenna 40. The presentinvention provides an efficient way, through a new configuration schemein the wireless communication device 22, to advantageously eliminate theneed of a costly in-vehicle compensator that now exist in hands-freesystems. Accordingly, it may be important, in some applications, todetermine whether the portable wireless communication device 22 isactually connected to the hands-free communication system in the vehicle20.

Second, the communication connection may be important, in someembodiments (such as the one shown in FIG. 3), in providing the portablewireless communication device 22 with the ability to receive audio froma vehicle microphone 34 for uplink wireless communications B. Thehands-free control unit 24 may be configured to provide the capabilityof switching, transferring, or otherwise routing the audio from thevehicle microphone 34 to the portable wireless communication device 22for the uplink wireless communications B.

Third, the communication connection may be important, in someembodiments (such as the one shown in FIG. 3), to provide the portablewireless communication device 22 with the ability to broadcast audio toa vehicle speaker 32 from downlink wireless communications A. Thehands-free control unit 24 may be configured to provide the capabilityof switching, transferring, or otherwise routing the audio to thevehicle speakers 32 from the portable wireless communication device 22.

Fourth, the communication connection in some embodiments may beimportant to the portable wireless communication device 22 for receivingvehicle information so that the device 22 can configure certainoperations prior to or during call set-up. For example, in oneembodiment of the present invention, the portable wireless communicationdevice 22 receives information from the vehicle 20 prior to or duringthe setup of a call. The vehicle information may include featuresavailable in the hands-free system in the vehicle 20 and data associatedwith configuring the portable wireless communication device 22 to usethose features. The vehicle information could be stored in a memory 83of a controller 82 of the hands-free control unit 24.

For instance, in one case, the vehicle information may include anidentification of whether the vehicle 20 has an external antenna 40 anddata associated with using the external antenna 40. Data associated withusing the external antenna 40 could include power loss informationrelated to sending communications across the internal cable 28B thatinterconnects the portable wireless communication device 22 and theexternal antenna 40. The portable wireless communication device 22 wouldthen use any received data to configure or otherwise adjust the outputpower of the device in the cellular transceiver 56 with a gain nominallyequal to the loss of the internal cable 28B. Moreover, the type of dataobtained or accessed by the device 22 should provide data of thein-vehicle cable loss of the system for each frequency band. Thus, thedevice 22 will know what the in-vehicle cable loss is and can accuratelyadjust for the cable loss at all desired frequency bands.

In one embodiment, each vehicle may have its own data associated with apower loss. This power loss needs to be accounted for by the portablewireless communication device 22. Accordingly, the portable wirelesscommunication device 22 may check whether the device is actuallyconnected to the external antenna 40 and, if so, increase its outputpower for uplink wireless communications to account for the power lossbased on the vehicle information.

To perform this operation, the microcomputer 52 may include transmitpower microcomputer 72 that is capable of adjusting a power amplifier(PA) module 74 within the cellular transceiver 56 with a gain nominallyequal to the loss of the internal cable 28B. The cellular transceiver 56may include radio frequency (RF) circuitry 76, a receiver (RX) module 78for receiving downlink wireless transmissions, and the PA module 74 fortransmitting uplink wireless transmissions. The adjustment made by thetransmit power microcomputer 72 only affects the output power for uplinkwireless transmissions. It is noted that this should be an acceptablelimitation, however, because most cellular phone systems are uplinklimited.

In another case, to further highlight the benefits of the presentinvention, referring to FIG. 4, the vehicle information may include anidentification of whether the vehicle has a separate embedded cellulartransceiver 50 within the vehicle 20 and data regarding the operation ofthe vehicle's embedded cellular transceiver 50. The data regarding theoperation could include the phone number of the vehicle's embeddedcellular transceiver 50. The portable wireless communication device 22could then use the phone number to automatically notify the cellularnetwork to forward an incoming call to the phone number of the vehicle'sembedded cellular transceiver 50. The vehicle's embedded cellulartransceiver 50 would then be capable of receiving and transmittingcellular communications through the radio system (including an audiospeaker 32 and a microphone 34) in the vehicle 20.

Referring to both FIGS. 3 and 4, in a further case, the vehicleinformation may include an identification of whether the vehicle 20contains an existing positioning unit 80 such as a Global PositionSystem (GPS) unit. This would inform the portable wireless communicationdevice 22 to configure or otherwise adjust any navigation functionswithin the portable wireless communication device 22 so that it mayreceive position information from the positioning unit 80 in the vehicle20. The position information received from the positioning unit 80 inthe vehicle 20 could then be used by the portable wireless communicationdevice 22 to perform enhanced navigation operations. For instance, thereceived position information could be used when a failure occurs with apositioning unit (not shown) within the portable wireless communicationdevice 22. The received position information could further be used incombination with a positioning unit within the portable wirelesscommunication device 22 to provide an integrated (and more accurate)position location solution.

The portable wireless communication device 22 may be set up to interfacewith different types of hands-free systems. In general, systemstypically have a hands-free control unit 24 that is configured tocontrol hands-free functions within the vehicle 20. For example, thehands-free control unit 24 may include a controller 82 and a pluralityof switches 84A, 84B, 84C, 84D. Referring to the embodiment illustratedin FIG. 3, the controller 82 may be connected to a switch 84A to providethe ability to switch, transfer, or otherwise route the audio for uplinkwireless communications B from the vehicle microphone 34 to the portablewireless communication device 22. The controller 82 may be furtherconnected to a switch 84B to provide the ability to switch, transfer, orotherwise route the audio of downlink wireless communications A from theportable wireless communication device 22 to the vehicle speakers 32. Inanother type of hands-free system, referring to FIG. 4, the controller82 may be connected to a switch 84A to provide the ability to switch,transfer, or otherwise route the audio for uplink wirelesscommunications B from the vehicle microphone 34 to the vehicle cellulartransceiver 50. The controller 82 may be further connected to a switch84B to provide the ability to switch, transfer, or otherwise route theaudio of downlink wireless communications A from the vehicle cellulartransceiver 50 to the vehicle speakers 32.

The hands-free control unit 24, in either embodiment, may further beconnected to peripheral input devices of the radio system of the vehicle20 such as a radio tuner 86 and a CD player 88 through switches 84C,84D. This allows the hands-free control unit 24 to mute the inputdevices during a phone conversation over the radio system. Thehands-free control unit 24 may also be connected to a user interface 90(that includes switch 42) to receive information such as whether toinitiate a call set-up.

In one embodiment, the switch 42 on the user interface 90 of the vehicleis capable of initiating an activation signal or other indicator to theportable wireless communication device 22. Sending a signal or otherindicator to the controller 82 of the hands-free control unit 24 can dothis. In response to receiving the signal from the switch 42, thehands-free control unit 24 would then be capable of sending anactivation signal or other indicator to the portable wirelesscommunication device 22. In one embodiment, the activation signal orindicator to the wireless communication device 22 can be done bytemporarily grounding a communication line (such as the transmit, ormicrophone, line) in the external communication cord 26A. The portablewireless communication device 22 would have the capability of detectingthe temporary ground in the line through circuitry further included inthe first detector 70A. This would inform the portable wirelesscommunication device 22 that the user would like to accept an incomingcall or place a new outgoing call.

The microcomputer 52 within the device is configured according to knownmethods to monitor the cellular transceiver 50 for pending incomingcellular voice communications. Upon receiving a pending voicecommunication, the microcomputer 52 may notify the operator of a pendingvoice communication via an audio alert in a speaker 92. Themicrocomputer 52 would then determine whether the vehicle operatoragrees to accept the voice communication. In one embodiment, themicrocomputer 52 may make this determination by waiting for apredetermined time period to detect whether the hands-free control unit24 transmits an activation signal or other indicator. As mentionedabove, in one embodiment, the activation signal may be temporarilygrounding a communication line (such as the transmit, or microphone,line) in the external communication cord 26A. The portable wirelesscommunication device 22 would have the capability of detecting thetemporary ground in the line through circuitry within the first detector70A. In an alternative embodiment, the microcomputer 24 may make thisdetermination by waiting for a predetermined period to detect whetherthe user has selected a button on the user interface 44 of the portablewireless communication device 22. If the pending incoming voicecommunication is not accepted, then the microcomputer 52 can do nothingand let the voice communication transfer to an electronic voiceanswering service. Alternatively, the microcomputer 52 can respond tothe voice communication by sending a special message to the incomingcaller that the operator of the vehicle is not able to respond to thecall at this time.

If the microcomputer 52 determines that the pending incoming voicecommunication is accepted (an activation signal or other indicator hasbeen detected or received), then the microcomputer 52 must set up thecall. In one embodiment, the microcomputer 52 will obtain or access dataregarding certain vehicle information obtained from the vehicle 20 orobtained from its own memory 54. The portable wireless communicationdevice 22 will then use the obtained or accessed vehicle information toconfigure the device 22.

In one embodiment, the hands-free control unit 24 will transfer vehicleinformation to the portable wireless communication device 22 at the timethe device is plugged into the vehicle 20. The received vehicleinformation may be stored in memory 54 of the portable wirelesscommunication device 22. The stored vehicle information would then bemade available to the device at the time of call setup (or sooner) forpurposes of configuring the device. In another embodiment, the portablewireless communication device 22 accesses the vehicle information fromthe vehicle 20 at or during the time of call setup. In this case, thevehicle information is stored in memory 83 of the controller 82 andaccessed after it is determined that the first interface 36A isconnected to the vehicle 20. In a further embodiment, the portablewireless communication device 22 accesses its own memory 54 having adatabase that stores information regarding different types of vehiclesand hands-free systems. The portable wireless communication device 22determines the type of vehicle and hands-free system and then accessvehicle information stored in the database.

After the portable wireless configuration device 22 obtains or otherwiseaccesses the vehicle information, the device 22 will then configure theoperations of the device 22 based on data in the vehicle information.For example, as mentioned above, the vehicle information may containinformation on whether the vehicle 20 has an external antenna 40 anddata associated with a power loss for communicating through the externalantenna 40. The wireless communication device 22 would configure theoutput power for uplink wireless transmissions B based on the obtaineddata after it is determined that the external antenna 40 is connected tothe second interface 36B of the device 22. The microcomputer 52 has thecapability of controlling an antenna switch 66 that switches theconnection of the cellular transceiver 56 between the device's internalantenna 58 and the vehicle's external antenna 40.

In one embodiment, the transmit power microcomputer 72 increases orotherwise adjusts the output power at the RF power amplifier (PA) module74 of the cellular transceiver 56 with a gain nominally equal to theloss of the internal cable 28B. The information regarding the loss iscontained in the vehicle information obtained or accessed by the device22. Preferably, the vehicle information should specify a cable powerloss of the system for each frequency band. Thus, the device 22 willknow what the in-vehicle cable loss is and can accurately adjust for thecable loss at all of the desired frequency bands. The transmit powermicrocomputer 72 may receive feedback regarding the output level at thePA module 74.

In another example, also mentioned above, the vehicle information maycontain information on whether the vehicle 20 has a separate cellulartransceiver 50 in the vehicle 20 and data associated with the operationof the cellular transceiver 50. The data associated with the operationof the transceiver 50 may include a phone number for wirelesslycommunicating with the transceiver 50. Here, the wireless communicationdevice 22 could use the data to forward incoming calls to the phonenumber specified in data.

In a further example, also mentioned above, the vehicle information maycontain information on whether the vehicle 20 has a positioning unit 80such as a GPS unit and data associated with the operation of thepositioning unit 80. This would inform the portable wirelesscommunication device 22 to configure or otherwise adjust any navigationfunctions within the portable wireless communication device 22 so thatit may receive position information from the positioning unit 80 in thevehicle 20.

As one of ordinary skill in the art will appreciate, additionalconfiguration information could be obtained or transferred between theportable wireless communication device 22 and the vehicle 20 at or priorto call setup to aid in configuring the device 22 when it is connectedto a vehicle 20. The present invention reduces the cost of a hands-freesystem in the vehicle as well as reduces the number of steps inanswering and placing voice communications. With a single push of abutton, the wireless communication device 22 is configured based on datareceived from the vehicle 20 prior to or during the time of call set-up.The vehicle radio system is then configured to receive downlink audioand send uplink audio of the voice communication.

In one embodiment, the portable wireless communication device 22includes a processor in the microcomputer 52 that implements softwarestored in the memory 54. FIG. 5 illustrates one embodiment of a methodthat may be implemented by using the configuration scheme set forth inthe above discussion. This method uses vehicle information that wouldinclude data associated with a power loss for communicating through theexternal antenna 40 in the vehicle 20.

The method begins at decision block 110 where the portable wirelesscommunication device 22 determines whether the device 22 is connected tothe vehicle 20. This may include determining whether the device 22 isconnected to the hands-free control unit 24. This could be done throughthe use of a first detector 70A in the device 22. The first detector 70Amay include circuitry within the device 22 that monitors one of thecommunication lines connected to the device 22 via the first interface36A. If the monitored communication line is temporarily connected toground, then the first detector 70A would determine that the device 22is connected to the vehicle 20. If the device 22 is not connected to thevehicle 20, then the method proceeds to block 112 where the device 22would use the nominal RF output power for the power class specified forhandheld portable devices. For example, a GSM 1900 MHz Mobile Station(MS) handheld portable device (Power Class 1) must conform to a nominalmaximum output power of 1 W (30 dBm) with a tolerance for normalconditions of +/−2 dBm. [GSM 05.05 version 8.4.0 Release 1999, Section4.1.1] The process then returns to decision block 110 where the device22 waits for a change in a condition such as the device 22 beingconnected to the vehicle 20.

If the portable wireless communication device 22 is determined to beconnected to the vehicle 20, then the method proceeds to decision block114. At decision block 114, the process determines whether an externalantenna 40 is connected to the portable wireless communication device22. This may be important for some devices because one does not want tojust increase the output power for uplink wireless transmissions unlessit is verified that the external antenna 40 is available and properlyconnected to the device 22. If the device 22 is not connected to theexternal antenna 40, then the device 22 would use nominal RF outputpower for its class of portable device. Again, the process then returnsto decision block 114 where the device 22 waits for a change in acondition such as the device 22 being connected to the external antenna40.

If the portable wireless communication device 22 is determined to beconnected to the external antenna 40, then the method may proceed toeither process block 116 or 118, depending on the implementation. Atprocess block 116, the device 22 obtains data, such as power offsetinformation, from the vehicle 20. This could be done by having thedevice 22 obtain or access information from the hands-free control unit24 through the first interface 36A of the device 22. For instance, thedevice 22 could access memory 83 within the controller 82.Alternatively, at process block 118, the device could obtain data, suchas power offset information, from its own memory 54. The data could becontained in memory 54 in a number of ways. For instance, vehicleinformation could be transferred to memory 54 of the device 22 at thetime the device 22 is connected to the vehicle 20 via the first (orvehicle) interface 36A. Alternatively, the memory 54 of the device 22could be previously stored with data regarding a variety of types andmakes of vehicles as well as types and makes of hands-free systems.Furthermore, the data stored in memory 54 could be done through adatabase or look-up table. For purposes of illustration, an example of adatabase or look-up table is shown in table 130 of FIG. 5. Inparticular, the data can be stored in memory 54 according to a pluralityof frequency bands.

After process blocks 116, 118, the method proceeds in one embodiment toprocess block 120 where the portable wireless communication device 22adjusts its output power for uplink wireless transmissions based on thedata obtained in process blocks 116 or 118. At this point, the device 22may proceed to establishing a link for transmitting and receivingwireless transmission through the cellular transceiver 56. The processmay be set up to end or, alternatively, return to the first decisionblock 110 and wait for a change in a condition.

FIG. 6 illustrates another embodiment of a method that may beimplemented by using the present invention. Again, this method usesvehicle information that would include data associated with a power lossfor communicating through the external antenna 40 in the vehicle 20.Here, the decision blocks 110, 114 and process blocks 112, 116, 118 arethe same as those described in relation to FIG. 5. Again, for purposesof illustration, an example of a database or look-up table is shown intable 130. The method, however, may alternatively account for whetherthe device 22 is currently in an active call before making any poweradjustments.

For instance, at decision block 122, the method may make a determinationof whether the portable wireless communication device 22 is alreadycurrently in an active call. This may occur when a person is on anactive call but plugs the device 22 into the vehicle 20 or connects thedevice 22 to an external antenna 40. If the device 22 is in an activecall, no adjustments to the power will be made and the process returnsuntil the active call is completed. When the device 22 is not in anactive call, the method proceeds to process block 124. Here, the device22 is deregistered from a connected base station system or other networkthat it may be currently registered. This may be important in somewireless protocols where a base station system or other network commandsthe device 22 to change from one power control level to another powercontrol level within a type of device class.

The process then proceeds to block 126 where the device 22 switches tohigher output power and changes to a different device class or set ofhigher order power levels. For instance, there exist within the GSMstandard one set of power control levels for a class pertaining tohandheld portable devices (Power Class 1). There also exists another setof power control levels for a class that is restricted to transportableor vehicular mounted units or devices (Power Class 3). As mentionedearlier, a GSM 1900 MHz Mobile Station (MS) handheld portable device(Power Class 1) must conform to a nominal maximum output power of 1 W(30 dBm) with a tolerance for normal conditions of +/−2 dBm. A GSM 1900MHz Mobile Station (MS) vehicular mounted device (Power Class 3) mustconform to a nominal maximum output power of 2 W (33 dBm) with atolerance for normal conditions of +/−2 dBm. [GSM 05.05 version 8.4.0Release 1999, Section 4.1.1] Accordingly, in one embodiment, the methodincludes switching from a device class pertaining to handheld portabledevices to a class pertaining to vehicular mounted devices after it isdetermined that the device is connected to the vehicle and to anexternal antenna.

Then, the process proceeds to block 128 where the device 22 re-registersthe device to the connected base station system or other network at thedifferent power class so that the device may operate at a different (andpreferably higher order) set of power control levels. The process maythen end or, alternatively, return to the first decision block 110 toawait a change in condition.

FIG. 7 illustrates a further embodiment of a method that may beimplemented by using the present invention. This method, however, usesvehicle information that would include an identification of whether thevehicle has a separate cellular transceiver 50 within the vehicle 20 anddata regarding the operation of the vehicle cellular transceiver 50. Thedata regarding the operation of the vehicle could include a phone numberthat is associated with wirelessly communicating with the vehiclecellular transceiver 50.

The method may start at decision block 132 where a determination is madewhether the device 22 is connected to the vehicle 20. This could includedetermining whether the device 22 is connected to the hands-free controlunit 24. This could be done through the use of a first detector 70A inthe device, as discussed in more detail above. If the device 22 is notconnected to the vehicle 20, then the process will stay at the decisionblock 132 until a determination is made that the device 22 is connectedto the vehicle 20. When a determination is made that the device 22 isconnected to the vehicle 20, then the process continues to block 134.

At block 134, the process may include a step of obtaining vehicleinformation from the vehicle 20. Here, the device 22 may obtain data,such as whether the vehicle 20 contains its own cellular transceiver 50and, if so, data associated with communicating with the transceiver 50.This could be done by having the device 22 obtain or access informationfrom the hands-free control unit 24 through the first interface 36A ofthe device 22. Alternatively, the device could obtain data from its ownmemory that was previously obtained or entered into the device 22. Theprocess then proceeds to decision block 136.

At decision block 136, a determination is made whether the vehicleincludes a separate transceiver 50. This could be done by looking at thevehicle information obtained at process block 134. If the vehicle 20does contain a separate transceiver 50 (such as the one shown in FIG.4), then the process continues to block 138 where the device 22configures itself to forward incoming calls to the vehicle transceiver50. This could include notifying the cellular network to forward anincoming call to the phone number of the vehicle's embedded cellulartransceiver 50. The data for forwarding the call may be accessed fromthe vehicle information obtained in process block 134. The process maythen end or, alternatively, continue with further steps for cancelingthe call forwarding configuration when it is detected that the device 22is no longer connected to the vehicle 20.

If the vehicle 20 does not contain a separate transceiver 50 (such asthe one shown in FIG. 3), then the process may continue to blocks 140and 142. At block 140, the device 22 is configured to transfer audiofrom the downlink wireless communications A to the vehicle speakers 32via the first interface 36A. At block 142, the device 22 may then beconfigured to receive audio for the uplink wireless communications Bfrom the vehicle microphone 34 via the first interface 36A. The processmay then end or, alternatively, continue with further steps forcanceling the configuration when it is detected that the device 22 is nolonger connected to the vehicle 20.

What has been described is a system and method for configuring aportable wireless communication device when the device is connected tothe vehicle. The system and method reduces the cost, complexity and thenumber of distractions when answering or establishing a cellularcommunication. The above description of the present invention isintended to be exemplary only and is not intended to limit the scope ofany patent issuing from this application. The present invention isintended to be limited only by the scope and spirit of the followingclaims.

1. A portable wireless communication device comprising: a firstinterface for connecting the wireless communication device to a vehicle;a second interface for connecting the wireless communication device toan external antenna; and a microcomputer having a first detector and asecond detector, the first detector for determining whether the firstinterface is connected to the vehicle, the second detector fordetermining whether the second interface is connected to the externalantenna; wherein the microcomputer is programmed to access dataassociated with a power loss for communicating through the externalantenna and to adjust an output power of the wireless communicationdevice based on the accessed data when the first detector determinesthat the first interface is connected to the vehicle and the seconddetector determines that the second interface is connected to theexternal antenna.
 2. The portable wireless communication device in claim1, wherein the first detector monitors whether a communication lineconnected to the first interface is grounded.
 3. The portable wirelesscommunication device in claim 1, wherein the second detector detects thepresence of a resistor in the external antenna.
 4. The portable wirelesscommunication device in claim 1, wherein the microcomputer accesses thedata associated with the power loss from a hands-free control unit inthe vehicle.
 5. The portable wireless communication device in claim 1,wherein the portable wireless communication device further has a memorythat stores data associated with a plurality of power losses, each powerloss associated with a different frequency band.
 6. A method in aportable wireless communication device, the method comprising the stepsof: determining whether the wireless communication device is connectedto a vehicle; determining whether the wireless communication device isconnected to an external antenna; if the wireless communication deviceis connected to a vehicle and the wireless communication device isconnected to the external antenna, then obtaining data associated with apower loss for communicating through the external antenna and adjustingan output power for uplink wireless transmissions based on the obtaineddata.
 7. The method in claim 6, wherein the step of obtaining dataassociated with the power loss for communicating through the externalantenna includes obtaining the data from a hands-free control unit inthe vehicle.
 8. The method in claim 6, wherein the step of obtainingdata associated with the power loss for communicating through theexternal antenna includes obtaining the data from a memory in thewireless communication device.
 9. The method in claim 8, wherein thememory in the wireless communication device stores the data according toa plurality of frequency bands.
 10. The method in claim 8, wherein thememory in the wireless communication device stores the data according toa type and make of vehicle.
 11. The method in claim 6, wherein themethod comprises the further steps of: determining whether the wirelesscommunication device is in an active call; if it is determined that thewireless communication device is not in an active call, then changing aregistration of the wireless communication device with a network.